Abseil Common Libraries (C++) (grcp 依赖)
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67 lines
2.6 KiB
67 lines
2.6 KiB
// Copyright 2018 The Abseil Authors. |
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// |
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// Licensed under the Apache License, Version 2.0 (the "License"); |
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// you may not use this file except in compliance with the License. |
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// You may obtain a copy of the License at |
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// |
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// https://www.apache.org/licenses/LICENSE-2.0 |
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// |
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// Unless required by applicable law or agreed to in writing, software |
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// distributed under the License is distributed on an "AS IS" BASIS, |
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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// See the License for the specific language governing permissions and |
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// limitations under the License. |
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// An async-signal-safe and thread-safe demangler for Itanium C++ ABI |
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// (aka G++ V3 ABI). |
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// |
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// The demangler is implemented to be used in async signal handlers to |
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// symbolize stack traces. We cannot use libstdc++'s |
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// abi::__cxa_demangle() in such signal handlers since it's not async |
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// signal safe (it uses malloc() internally). |
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// |
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// Note that this demangler doesn't support full demangling. More |
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// specifically, it doesn't print types of function parameters and |
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// types of template arguments. It just skips them. However, it's |
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// still very useful to extract basic information such as class, |
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// function, constructor, destructor, and operator names. |
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// |
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// See the implementation note in demangle.cc if you are interested. |
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// |
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// Example: |
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// |
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// | Mangled Name | The Demangler | abi::__cxa_demangle() |
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// |---------------|---------------|----------------------- |
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// | _Z1fv | f() | f() |
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// | _Z1fi | f() | f(int) |
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// | _Z3foo3bar | foo() | foo(bar) |
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// | _Z1fIiEvi | f<>() | void f<int>(int) |
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// | _ZN1N1fE | N::f | N::f |
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// | _ZN3Foo3BarEv | Foo::Bar() | Foo::Bar() |
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// | _Zrm1XS_" | operator%() | operator%(X, X) |
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// | _ZN3FooC1Ev | Foo::Foo() | Foo::Foo() |
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// | _Z1fSs | f() | f(std::basic_string<char, |
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// | | | std::char_traits<char>, |
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// | | | std::allocator<char> >) |
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// |
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// See the unit test for more examples. |
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// |
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// Note: we might want to write demanglers for ABIs other than Itanium |
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// C++ ABI in the future. |
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// |
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#ifndef ABSL_DEBUGGING_INTERNAL_DEMANGLE_H_ |
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#define ABSL_DEBUGGING_INTERNAL_DEMANGLE_H_ |
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namespace absl { |
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namespace debugging_internal { |
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// Demangle `mangled`. On success, return true and write the |
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// demangled symbol name to `out`. Otherwise, return false. |
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// `out` is modified even if demangling is unsuccessful. |
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bool Demangle(const char *mangled, char *out, int out_size); |
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} // namespace debugging_internal |
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} // namespace absl |
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#endif // ABSL_DEBUGGING_INTERNAL_DEMANGLE_H_
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